Air system for forcing liquids.



C. A. WAITZ.

AIR SYSTEM FOR FORCING yLIQUIDS.

APPLICATION FILED DEC. 5| 19l5l atented Apr. 3, 1917.

2 SHEETS-SHEET l.

v s w 2 2 C. A. WAITZ.

AIR SYSTEM FOR FORCING LIQUIDS.

APPLlATlON FILED DEC. 6.1915.

Patnted Apr. 3, 1917.

Z SHEETS-SHEET 2.

n chamber, 7 a casing meanest.

spasmes-non or Letters Patent.

t: srs'rnn non recrue tra# Application led December 6, 1915. Serial No. 65,164.

To all whom 'it may concern.:

Be it known that'l, CHARLES A. WArrz, a citizen of the United `Ebtates, residing at Rouseville, in the county of Venango and State of Pennsylvania, have invented new and useful Improvements in Air Systems -for Forcing Liquids, ing is a specication.

This invention relates to air systems for forcing liquids and consists in certain improvements in the construction thereof as 'will be hereinafter fully described. and pointed out in the, claims.

The invention is particularly adapted for forcing liquids from Artesian wells, especially oil wells, and is so illustrated Vin the following drawings wherein- Figure 1 shows a vertical central section of a well system,

Fig. 2 an enlarged view of the air cushion used in said system, Q

Fig. 3 an enlarged view of the oat valve used in said system with its guides andadjacent parts,

Fig. 4 a section on the line 4-4 in Fig. 3,

Fig. 5 a section on the line 5-5 in Fig. 3.

1 marks the strainer, 2 the fitting in which the upper end of the strainer is attached, 3

the nipple connecting the strainer with ther bottom 4 of the float chamber or working barrel, 5 the tubing forming the float chamber, 6 the discharge conduit ordinarily termed a tubing leading from the float head, 8a "l" for the upper end of the conduit 6, and 9 the discharge pipe. The usual casing 10 is arranged in the head 7 A checkor standing valve 11 is arranged in the fitting 2 and a second check or standing valve 12 is arranged in the bottom 4.y The check 12 is carried by a pipe 12a a considerable distance Aabove the bottom 4 so as to permit a space for the delivery of sand at the bottom of the float chamber thus extending the period to which the apparatus may be operated without cleaning out the Sand.

Air is delivered by a pipe 13, thence by way of a pipe 14 through the gland 15 to the bypass 16 leading to the float chamber, the air pipe having a tapered end 17vmaking a joint with the upperfend of the bypass so that the air pipe may be'readily pulledand put` back in place without pullmg the float chamber. In the discharge of liquid from the float chamber it is rst car- V20 through the offset of which the followected to ried through the passage 18,-thence by U- bend 19 to the vertical or up-standing pipe 21, pipe 22, and tting 23 into the air cushion 24. The air cushion, as will be noted in Fig. 2, is an upstanding tube with its upper end closed and the liquid'is forced into the lower end of it so that the air cushion is subjected to the momentum of the liquid for increasing the compression of the air in the cushion. rlhe liquid passes from the air cushion by way of the lateral passages 25, thence up through the pipe 26 through the fitting 27, check valve 28, pipe 29 to the odset 30. A coupling 31 makes a closure between the upper the .guide cylinder and forms a cushion for the float.

An opening 38 is also provided to Lprevent the trapping of air in the upper end of the loat chamber. Openings 39 are provided at the lower end of the cylinder ratentea npr. a, fait.

so that the liquid in the cylinder may follow the level of the liquid in the float cham-` ber. The cylinder is slipped over theend of the U-bend and rests on the shoulder 40. lt has the cover or cap 41 with an entension 42 extending around the vertical` pipe 20. The cap is clamped in place by a set screw 43. The float, it will be noted, is cylindrically shaped with crowned ends.

This shape permits of the use of glass as a' material from which the float may be made. The float chamber in deep wells -is subvery high pressure and the crushing strength of glass is very great providing it can be equally distributed. The valve surface arranged at the lower end is also particularly desirable formed of glass as it can be readily ground to surface. lf prefer to make theV walls immediately back of the valve surface thicker than the remaining wall so as to sustain the strain of seating. The di'erent valves 11, 12 and 28 are of the same general construction each having an upright pipe as 44 ending in a seat 45.

'ai i roo i- AThe valveidiskJor' ball 4.6 operates ontlllie v of the oat air cushion the inertia, of the moving column of liquid issuicient to carryl a suii'icient yamount of liquid past the check 28 to form the iioat 'chamber 5 by \leased' by way 20.

to .refill between the check '28. and

seat 4 5 and has a downwardly exten stem 47 with a spider-shaped stop 48 at the" bottom. By thisconstruction the use of a` cage fat the top isobviated and in conse` quence any plugging or interference by reason of the lodgment of' sand is obviated.

In yoperating the pump, liquid flows into gravity.` illin this chamber. The float 32 i ifted as the iquid rises above the level of this iloat.. Air is turned in through the pipe 13, pipe 14 and bypass 16. This -forcesA the liquid out lthrough the passage past-the valve 28.

bypass 16 v a partial vacuum 1n the intervening conduit the float valve and as a'resultjif there is no leakage of the ioat 4valve or check valve the oat valve is locked in position on its seat. With the air cushion thea1rfunder pressure in the cushion is suiiicient to'compensate for any such over-running of the liquid 1n the conduit and` to thus `-prevent the locking of the ioat valve in the manner described. WhatI claim as new is `1. In an air` combination o f a'barrel; means for supplying air under pressure to the barrel' to move the 1i uid; a discharge conduit. for the liquid leading from the barrel; a check valve in the conduit to' prevent a' return dowsystem for forcing liquids, the

of liquid; a float valve lclosing the entrancef to the conduit lto the air; and an air cushion in the conduit between the lloat valve and iiow of liquid to subject the air in the air cushion to the momentum of the passing liquid. A

3. In an air system for forcing liquids, the combination4 of a barrel; means for supplying air under pressure to the barrel to move the liquid; a discharge conduit for the liquid leadingy from the barrel; a check valve 1n the conduit to prevent a return liow of liquid; a float valve closing the entrance to the conduit to the dir; and an air cushion in the conduit between the float valve and the check valve, said air cushion comprising a fitting forming a portion of the conduit and a closed tube extending upwardly from the fitting, said tube having lateral openings exten ing from its lower end.

In' anair system for forcing liquids, the combination of aiioat chamber; means for supplying am'r under 'pressure to the chamber; a discharge conduit leading from the chamber; a valve seat at the entrance t0 y the conduit; and a one-piece cylindrically shaped glass oat having of the ends .forming a wall of the oat back of crowned ends, one valve surface, the they surface belng thickened.

In testimony whereof I have hereunto lset my hand.

' CHARLES A. WAITZ. 

